Health services in Shanghai County: childhood immunization.
D002648:Child; D002662:Child Health Services; D002675:Child, Preschool; D002681:China; D003140:Communicable Disease Control; D003141:Communicable Diseases / Q000453:epidemiology; D003362:Cost-Benefit Analysis; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D007231:Infant, Newborn